Helium's electron configuration is 1s2.
Neon's electron configuration is 1s22s22p6.
All of the rest of the noble gases, like neon, have the maximum number of electrons in their outermost s and p orbitals (valence shells), which is eight.
The "Noble gas electron configuration," or the condensed electron configuration, for F is [He] 2s2 3p5.
The noble gas electron configuration of radon is [Xe]4f145d106s26p6.
Losing an electron cesium has a noble gas configuration.
The electron configuration and noble gas core for Li+ is that of He: Li+: (1s2, 2s0)
The noble gas electron configuration of Phosphorus is [Ne] 3s2 3p3
Calcium loses two electrons to obtain a noble-gas electron configuration.
The electron configuration of boron is: [He]2s2.2p1.
In noble gas notation, you don't have to write the electron configuration up to that noble gas. You simply put the noble gas in brackets [noble gas] and then continue to write the electron configuration from that point. It just makes it shorter and easier to write electron configurations for elements with a lot of electrons.
[noble gas]ns2 np6
The element chlorine does not have noble gas configuration. But chloride ion formed (when chlorine accepts an electron) has noble gas configuration of argon.
Only group 18 elements have noble gas configuration. All other elements lack a noble gas electronic configuration.
Iodine accepts one electron to achieve noble gas configuration. Strontium loses two electrons to achieve noble gas configuration. Nitrogen accepts three electrons to achieve noble gas configuration. Krypton already has a noble gas configuration.